@article{ZNSL_1976_57_a11,
     author = {A. V. Yakovlev},
     title = {On the problem of classification of finite rank groups without torsion},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {171--175},
     publisher = {mathdoc},
     volume = {57},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1976_57_a11/}
}